All Possible Area and Other Codes (300-399)
(assigned, not assigned, special, etc.)

The "North American Numbering Plan" has a myriad of area and special codes. This page covers all "possible" codes and other codes in the 300-399 range along with their status.

Important note: The status of area and other codes is constantly changing. This is the latest information we have.

codes in the 200-299 range
codes in the 300-399 range - THIS PAGE
codes in the 400-499 range
codes in the 500-599 range
codes in the 600-699 range
codes in the 700-799 range
codes in the 800-899 range
codes in the 900-999 range

Code
Description
300 (reserved - easily recognizable number)
301 Maryland
302 Delaware
303 Colorado
304 West Virginia
305 Florida
306 Manitoba
307 Wyoming
308 Nebrasak
309 Illinois
310 California
311 (not an area code - non-emergency number to reach local government - dial three digits)
312 Illinois
313 Michigan
314 Missouri
315 New York
316 Kansas
317 Indiana
318 Louisiana
319 Iowa
320 Minnesota
321 Florida
322 (reserved - easily recognizable number)
323 California
324 (not assigned)
325 Texas
326 (not assigned)
327 (reserved for Arkansas)
328 (not assigned)
329 (not assigned)
330 Ohio
331 Illinois
332 New York (active starting June, 2017, overlaying 212,646)
333 (reserved - easily recognizable number)
334 Alabama
335 (not assigned)
336 North Carolina
337 Louisiana
338 (not assigned)
339 Massachusetts
340 U.S. Virgin Islands
341 (reserved for California)
342 (not assigned)
343 Ontario
344 (reserved - easily recognizable number)
345 Cayman Islands
346 Texas
347 New York
348 (not assigned)
349 (not assigned)
350 (not assigned)
351 Massachusetts
352 Florida
353 (reserved for U.S.)
354 (reserved for Quebec)
355 (reserved - easily recognizable number)
356 (not assigned)
357 (not assigned)
358 (not assigned)
359 (not assigned)
360 Washington
361 Texas
362 (not assigned)
363 (not assigned)
364 Kentucky
365 Ontario
366 (reserved - easily recognizable number)
367 (reserved for Quebec)
368 (reserved for Alberta)
369 (reserved for California)
370 (reserved for consecutive numbers if ever needed)
371 (reserved for consecutive numbers if ever needed)
372 (reserved for consecutive numbers if ever needed)
373 (reserved for consecutive numbers if ever needed)
374 (reserved for consecutive numbers if ever needed)
375 (reserved for consecutive numbers if ever needed)
376 (reserved for consecutive numbers if ever needed)
377 (reserved for consecutive numbers if ever needed)
(reserved - easily recognizable number)
378 (reserved for consecutive numbers if ever needed)
379 (reserved for consecutive numbers if ever needed)
380 Ohio
381 (not assigned)
382 (reserved for Ontario)
383 (not assigned)
384 (not assigned)
385 Utah
386 Florida
387 (reserved for Ontario)
388 (reserved - easily recognizable number)
389 (not assigned)
390 (reserved for possible numbering expansion in the future)
391 (reserved for possible numbering expansion in the future)
392 (reserved for possible numbering expansion in the future)
393 (reserved for possible numbering expansion in the future)
394 (reserved for possible numbering expansion in the future)
395 (reserved for possible numbering expansion in the future)
396 (reserved for possible numbering expansion in the future)
397 (reserved for possible numbering expansion in the future)
398 (reserved for possible numbering expansion in the future)
399 (reserved for possible numbering expansion in the future)

codes in the 200-299 range
codes in the 300-399 range - THIS PAGE
codes in the 400-499 range
codes in the 500-599 range
codes in the 600-699 range
codes in the 700-799 range
codes in the 800-899 range
codes in the 900-999 range